The most important function of villi in the small intestine is

Options

A. to provide strength to the intestine
B. to provide space for capillaries and lacteals
C. to provide increased surface area for absorption of digested food
D. to provide habitat for bacteria

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of the Small Intestine:**
- The small intestine is divided into three parts: the duodenum, jejunum, and ileum.
- Each part has specific functions related to digestion and absorption.

2. **Function of Each Part:**
- The **duodenum** is primarily responsible for digestion, where food is mixed with digestive juices.
- The **jejunum** and **ileum** are mainly involved in the absorption of nutrients.

3. **Role of Villi:**
- Villi are small, finger-like projections found in the lining of the small intestine.
- Their primary role is to increase the surface area for absorption.

4. **Microvilli:**
- On the surface of each villus, there are even smaller projections called microvilli.
- These further enhance the absorptive capacity of the small intestine.

5. **Importance of Villi in Absorption:**
- The increased surface area provided by villi and microvilli allows for a more efficient absorption of nutrients from digested food into the bloodstream.
- This is crucial for the body to obtain essential nutrients.

6. **Conclusion:**
- The most important function of villi in the small intestine is to provide an increased surface area for the absorption of digestive products.

**Final Answer:**
The most important function of villi in the small intestine is to provide increased surface area for absorption of digestive products.

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